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authorArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-12-06 17:47:30 +0100
committerArtem Bityutskiy <Artem.Bityutskiy@nokia.com>2007-12-26 18:15:14 +0100
commit393852ecfeec575ac78216b0eb58e4fd92f0816c (patch)
tree99edbcd7fee9cdaa69f51187834f93ada73feada /drivers/mtd/ubi/eba.c
parentUBI: bugfix: allocate mandatory EBs first (diff)
downloadlinux-393852ecfeec575ac78216b0eb58e4fd92f0816c.tar.xz
linux-393852ecfeec575ac78216b0eb58e4fd92f0816c.zip
UBI: add ubi_leb_map interface
The idea of this interface belongs to Adrian Hunter. The interface is extremely useful when one has to have a guarantee that an LEB will contain all 0xFFs even in case of an unclean reboot. UBI does have an 'ubi_leb_erase()' call which may do this, but it is stupid and ineffecient, because it flushes whole queue. I should be re-worked to just be a pair of unmap, map calls. The user of the interfaci is UBIFS at the moment. Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers/mtd/ubi/eba.c')
-rw-r--r--drivers/mtd/ubi/eba.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 85f50c83cf42..c87db07bcd0c 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -656,11 +656,14 @@ retry:
goto write_error;
}
- err = ubi_io_write_data(ubi, buf, pnum, offset, len);
- if (err) {
- ubi_warn("failed to write %d bytes at offset %d of LEB %d:%d, "
- "PEB %d", len, offset, vol_id, lnum, pnum);
- goto write_error;
+ if (len) {
+ err = ubi_io_write_data(ubi, buf, pnum, offset, len);
+ if (err) {
+ ubi_warn("failed to write %d bytes at offset %d of "
+ "LEB %d:%d, PEB %d", len, offset, vol_id,
+ lnum, pnum);
+ goto write_error;
+ }
}
vol->eba_tbl[lnum] = pnum;